<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title></title>
	</head>
	<body>
		<select id="b" onchange=aa(this)>
			<option value="1" label="A"></option>
			<option value="2" label="B"></option>
			<option value="3" label="C"></option>
			<option value="4" label="D"></option>
		</select>
		<script src="./js/t1.js" />
	</body>
</html>
